WAVE-INDUCED SHIP MOTIONS IN HARBOUR ENTRANCES - A FIELD STUDY

Abstract

Extensive field monitoring programmes were implemented to study the behaviour of deep-draught ships in the entrance channels to two major South African ports. These programmes form part of a study to assess the future accessibility of these ports to ships of greater draught. This paper describes briefly the monitoring techniques and methods of data analysis used, and reviews the results with regard to the environmental conditions during the monitoring operations. The prototype results on ship response to waves will provide valuable data for the calibration and validation of both mathematical and physical models. The results are also used to establish allowance criteria based on safe underkeel allowances for ships presently using these harbours.